PRINTER FRIENDLY VERSION

Porosity.

Porosity is a condition in which a material (such as the rubber used to form a shaft seal) is full of numerous tiny bubbles (see Figure 167). The presence of these bubbles is a manufacturing defect due to air entrapment that, if present, should be spotted and corrected by the molder.

Porosity at the flex section can compromise the primary lip’s ability to flex properly in response to shaft eccentricities. Porosity on a secondary lip can limit the lip’s ability to exclude dust and dirt properly.

See Table 49 for a diagram of these seal components.

 

POSSIBLE MANUFACTURING DEFECTS MAIN PAGE

“Porosity is a condition in which a material is full of numerous tiny bubbles.”

 


Figure 167


Table 49